Substituted dithiocarbamates and method of making same



Patented Sept. 3, 1929.

UNITED STATES.

PATENT OFFICE.

SIDNEY GADWELL, OF LEONIA, -NEW JERSEY, ASSIGNOR TO THE NAUGATUCK CHEMICAL COMPANY, OF NAUGATUCK, CONNECTICUT, A CORPORATION OF CON- SUBSTITUTED DITHIOOARBAMATE AND METHOD OF MAKING SAME.

No Drawing.

This invention relates to a new class of products and to a method of making them. The new products may be generally termed the poly-nitrophenyl disubstituted dithiocarbamates. They may be made by treating a solution of a salt of a disubstituted dithocarbamate with a solution of a dinitro chlor benzol. They may also be prepared by treating a solution of a secondary amine with carbon 1 disulphide and sodiumhydroxide solution,

and then treating this reaction mixture,

which contains the sodium salt of the substituted dithiocarbamate, with an equal molecular amount of a dinitro chlor benzol in solution. The corresponding dinitro phenyl disubstituted dithiocarbamate separates out on cooling and may be recrystallized from alcohol.

2-4 dinitrophenyl '(hmeth l Z dithiocarbamate.--196 pounds of 23% dimethylamine solution (or an equivalent amount of approximately the same strength) is treated with 80 pounds ofcarbon disulphide in a closed system provided with a means of cooling the 25 reaction mixture. 160 pounds of 23% sodium hydroxide is added using the same closed system and cooling. Good agitation is desirable for these operations. The solution is filtered from the excess carbon disulphide or other extraneous matter and constitutes an aqueous solution of sodium dimethyl dithiocarbamate. 202 pounds of 2.4 dinitrochlor benzol is dissolved by adding 1188 pounds (82% by weight) of denatured alcohol at" about 104 'F. The solution of the sodium salt ofdimethyl dithioearbamate is run into the alcoholic solution of dinitrochlor benzol in the course of about 45. During the addition, the temperature of the reaction mixture 40 should be maintained at about 104 F. and

the mixture should-be well agitated. The

Application filed March 2, 1928. Serial No. 258,671.

140 C. and the commercially pre ared compound as suggested above may e purified and re-crystallization from alcohol or acetone.

The dinitrophenyl dimethyl dithiocarbamate is believed to have the formula- N-C-SONO: on, )4

Calcu- Fund lated SulphuL". 21. 8 22.3 Nitrogen 13. 3 14. 6

24, dinitrophenyl diethyl dimiombamaf a-Which is believed to have the formu a 73 grams of diethylamine are dissolved in 500 cc. of alcohol, 76 grams of carbon disulphide are added to this solution, the mixture being kept cold throughout; Afterwards 40 grams of sodium hydroxide dissolved in the smallest quantity ofwater possible are added to the above solution, the whole mixture being kept cold as possible. 202% grams of 1 chlor 2,4 dinitro benzol are tion 76 gramsof carbon bisulphide are added,

dinitrochlorbenzol dissolved in alcohol.

then'added to the solution as above prepared CH3 I 1 CH. M H NO. 0H.

NO 05 l 101 grams of diisopropylamine are dissolved in 500 cc. of alcohol. To this soluthe reaction mixture being kept cold throughout. 40 grams of caustic soda dissolved in the smallest possible amount of water are then added to the above solution. The solution then contains sodium diisopropyl dithiocarbamate. Theleupon 202 grams of 1 chlor 2,4 dinitrobenzol are added to the solution and the whole heated to 50 to 60 C.' for of an hour. The reaction mixture is then cooled to room temperature whereupon the product which is the 2,4 dinitrophcnyl diisopropyl dithiocarbamate crystallizes out. It is filtered from the solution and washed free from sodium chloride.

2-], dinitrophenyl dz'cyclohemyl dithz'ocarbamate.-Wh1ch is believed to have the for mula Yi -iI N-E-sONo. ii, m v N0: c-o a l slowly and with cooling. To the resultingalcoholicsolution of sodium dicychlohexyl dithiocarbamate are added 405 grams ofT2H4 e 2,4 dinitrophenyl dicyclohexyl dithiocarbamate separates out as a solid. This is recrystallized from alcohol giving a compound melting at 127 C.

The following compounds-have been pre- 01 slowly and with cooling. When this pared, isolated' and and identified in the above described manner.

2,4 dlnltrophenyl dlethyl m.p after recryst. 81' C. (undithiocarbamate from alcohol. corrected) 2,4 dlnltrophenyl dlnormal m.p after recr st. 84 C. (onpropyl dlthiocarbamate from alcoho corrected) 2,4 dlnltrophenyl dlisoprom.p after recryst. 117 C. (unp ldithiocarbamate from alcohol. corrected) 2,4 uitro'phenyl dinormal m.p after recryst. an oil (unb utyl dithlocarhamate from alcohol. corrected) 2,4 dinltrophenyl dilsobutyl [up after retryst. 85 C. (un

dlthlocarbamate from alcohol. corrected) 2,4 dlnitrophenyl dlallyl an oil dlthlocarbamate 2,4 dinltrophenyl dibenzyl m.p after recryst. 106 C. (unthiocarbamate from alcohol. corrected) 2,4 dlnltrophenyl dilsoamyl m.p after recryst. 52-54 C.

dlthiocarbamate from alcohol.

2,4 dlultrophenyl morpholyl m.p after recryst. 125430 C.

a 2,4 dlnitrophcnyl dlcyclo 127 C.

after recryst. hexyl dithiocarbamate em alcohol.

All of these compounds are insoluble in water, soluble in benzol, acetone, hot alcohol, and slightly soluble in cold alcohol.

At the present time one utility of the above new compounds is in connection with'the vulcanization of rubber, for which all of them are accelerators.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. As new compounds the dialkil dithiocarbamafles. h l 2. s new compoun s the ol itro en dialkyl dithiocarbamates. P W p y 3. As new compounds the dinitrophenyl disubstituted dithiocarbamates.

4. As new compounds the dinitroaryl dialkyl dithiocarbamates. I

5. As new compounds the dinitrophenyl dialkyl dithiocarbamates.

6. As new-compounds the 2-4 dinitrophenyl disubstituted dithiocarbamates.

7. As new compounds the 2-4 dinitrophenyl dialkyl dithiocarbamates.

8. 2-4 dinitrophenyl dimethyl dithiocarbamates.

9. A method of making poly nitrophenyl derivatives of disubstituted dithiocarbamates which comprises treating a solution of a salt of a disubstituted dithiocarbamate with a solution of a polynitrochlor benzol, and separatin the reaction product, poly nitrophenyl disubstituted 'dithio'carbamate, having the nitro groups joined to the benzene nucleus as in the aforesaid pol 'trochlor benzol.

10. A method of ma 'n dinitrophenyl derivatives of disubstitute dithiocarbamates which comprises treating a solution of a salt of a disubstituted dithiocarbamate with a solution of a dinitrochlor benzol, and separating the reaction product, dinitrophenyl disubstituted dithiocarbamate, having the polynitro aryl nitro iron 5 joined to the benzene nucleus I of dialkyl dithiocarbamates which comprises treating a solution of a salt of a dialkyl dithiocarbamate with a solution of a dinitro chlor benzol, and separating the reaction product,

'dinitro-phenyl dialkyl dithiocarbamate, having the nitro groups joined to the benzene nulcleus as in the aforesaid dinitrochlor benzo 12. A method of making 2-4 dinitrophenyl derivatives of dialkyl substituted dithiocarbamates which comprises treating a solution of a'salt of a dialkyl substituted dithiocarbamate with a solution of 2-4 dinitrochlor benzol, and separating the reaction product, 2-4 dinitrophenyl dialkyl disubstituted dithi0- carbamate.

13. A method of making 24 dinitrophenyl derivatives of dimethyl substituted dithiocarbamates which comprises treating a solution of a salt of a dimethyl substituted dithiocarbamate with a solution of 2-4 dinitrochlor benzol. and separating the reaction product, 2-4 dinitrophenyl dimethyl disubstituted (lithiocarbamate.

14. A method of making dinitrophenyl dialkyl (lithiocarbamates which comprises agitating a reaction mixture of a dialkyl amine, carbon disulphide and sodium hydroxide solution with a solution of a dinitro chlor benzol. and separating the reaction product, dinitrophenyl dialkyl dithiocarbamate from the reaction mixture.

15. A method of making dinitrophenyl dialkyl dithiocarbamates which comprises agitating a water solution of a dialkyl dithiocarbamate with a solution of a dinitro chlor benzol at approximately 104 C., cooling, separating and purifying the reaction product, dinitrophenyl dialkyl dithiocarbamate.

16. A method of making 2-4 dinitrophenyl dialkyl dithiocarbamates which comprises agitating a water solution of a dialkyl dithiocarbamate with a solution of a 2-4 dinitrochlor benzol at approximately 104 (1., cooling, separating and purifying the reaction product, 2-4 dinitrophenyl dialkyl dithiocarbamate.

17. A method of making 2-4 dinitrophenyl dialkyl dithiocarbamates which comprises agitating the reaction mixture of dimethyl amine, carbon disulphide and aqueous sodium hydroxide with an equal molecular weight of 2-4 dinitrochlor benzol in solution at approximately 104 C., cooling, separating the 2-4 dinitrophenyl dimethyl dithiocarbamate from the reaction mixture, and purifying by recrystallization.

Signed at New York, county and State of New York, this 21st day of February, 1928.

SIDNEY M. CADWELL. 

